500220121 has 8 divisors (see below), whose sum is σ = 530163144. Its totient is φ = 470334720.

The previous prime is 500220073. The next prime is 500220137. The reversal of 500220121 is 121022005.

It can be written as a sum of positive squares in 4 ways, for example, as 100220121 + 400000000 = 10011^2 + 20000^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 500220121 - 2¹⁵ = 500187353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (500220181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4171 + ... + 31903.

It is an arithmetic number, because the mean of its divisors is an integer number (66270393).

Almost surely, 2^500220121 is an apocalyptic number.

It is an amenable number.

500220121 is a deficient number, since it is larger than the sum of its proper divisors (29943023).

500220121 is a wasteful number, since it uses less digits than its factorization.

500220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28811.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 500220121 is about 22365.6012885860. The cubic root of 500220121 is about 793.8169823318.

Adding to 500220121 its reverse (121022005), we get a palindrome (621242126).

The spelling of 500220121 in words is "five hundred million, two hundred twenty thousand, one hundred twenty-one".